<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="index.css">
</head>
<body>
    <div id="app">
        <p>
            <input type="text" v-model:value="message">
        </p>
        {{message}}
    </div>
    
    <script src="vue.js"></script>
    <script>
        var app = new Vue({
            el:"#app",
            data:{
                message:"哈哈哈哈"
            }
        });
    </script>
</body>
</html>